Fix bogus warning about missing objcopy in setup-toolchains on macOS
Fix bogus warning about missing objcopy in setup-toolchains on macOS

Task-number: QBS-1192
Change-Id: I517b08100cea0154372b6b2fd7a9ac10778a7358
Reviewed-by: Joerg Bornemann <47777b9406dbddd02a3fdca8341789a013805a11@qt.io>

qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs